* 
1899] CURRENT LITERATURE 13 
Calvoa (8, with one new), Amphiblemma (7). A new genus, Afczeliella, is 
described, founded upon Guyonia ciliata Hook., in addition to the seven new 
genera (Urotheca, Petalonema, Cincinnobotrys, Myrianthemum, Tetraphyl- 
laster, Pheeoneuron, and Orthogoneuron) described by the author in Engler’s 
Pflanzenfamilien. In comparing the African representation of the family 
with its occurrence in other tropical regions, it is stated that the relationship 
to tropical America is hardly worth mentioning, while that to the East Indies 
is striking. This conclusion, taken in connection with that of Dr. Engler, 
mentioned above, in his study of the Moracez is especially interesting.— 
MC, 
Schwendener’s collected works. 
TWENTY YEARS ago Prof. Dr. Simon Schwendener was called to the Uni- 
versity of Berlin. For some years he has cherished the wish to bring together 
his papers published in the Berichte and Abhandlungen of the Royal Prussian 
Academy of Sciences and occasionally in other places. This wish has now 
been realized in the publication of two octavo volumes of almost goo pages.” 
The time is particularly opportune, because since January 1, 1898, separates 
of the publications in the Academy transactions have been made available to 
the book trade. 
The papers, to the number of thirty-one, have been reprinted without 
change, except of typographical errors and mistakes in calculations. The 
place of original publication is also cited. We wish we could add that the 
original pagination was indicated, but this has unfortunately been overlooked 
or considered inadvisable. To a few of the papers the author has added 
enough interest to reproduce the list : Trajectoric curves ; stomata ; phyl- 
lotaxy ; ascent of sap; swelling and double refraction ; twining of plants; 
stability (Festigkeit) of plants ; latex vessels; protective sheaths; pulvini. 
Besides these he has papers in collaboration with G. Krabbe on torsions of 
leaves and on the relation between turgor and growth. On each of these 
subjects there are from one to three papers, except on phyllotaxy which 
includes six, 
Nothing need be said as to the contents of the volumes, for Schwendener’s 
researches have already a high place in the esteem of his contemporaries. It 
'S @ matter of congratulation both for author and botanists that they have now 
oo conveniently collected as have those of Sachs, Nageli and Pringsheim.— 
bg .B. : 
- * SCHWENDENER, S, Gesammelte botanische Mittheilungen. 8vo. Vol. I. pp. 
Vill + 453. figs. 15, él. 71. Vol. Il. ppvi+ 419. figs. 8, pl. 15. Berlin: Gebriider Born- 
traeger. 1898, AZ 25. 
